The Photometric Study of EX Dra: A Dwarf Nova Exhibiting a Titled and Precessional Disk
文献类型：期刊论文
| 作者 | Liu W(刘伟)2,3,4,5,6 ; Qian, Sheng-Bang4,5; Shi XD(施相东)2,3; Sun QB(孙起斌)2,3; Fang, Xiao-Hui1; Wang, Qi-Shan1
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2024-10-01 |
| 卷号 | 974期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ad6f97 |
| 产权排序 | 第4完成单位 |
| 文献子类 | Article |
| 英文摘要 | We present a photometric study of EX Dra, a dwarf nova that has been extensively observed by the Transiting Exoplanet Survey Satellite. The data reveal the occurrence of 20 complete outbursts, exhibiting several intriguing and rare characteristics. The light curves exhibit a distinct superorbital signal with a period of approximately P sor similar to 4.39(7) days, along with a negative superhump showing an approximate period of P nsh similar to 4.805(1) hr, indicating that the accretion disk is tilted and undergoing precession with the period of P sor. In addition, the time-varying nature of P sor suggests that the precession period is fluctuating.The eclipsing light minima O - C analysis during quiescence shows an oscillation with period of 3.9(5) days, which is a little shorter than the superorbital period. We contend that this is unlikely to be a sudden alteration of the orbital period, but rather, it is influenced by the tilt and precession of the accretion disk. Notably, we found an amplitude shift in the outburst behavior from 3.5 mag with a periodicity of about 26 days to an amplitude of around 2.5 mag with a periodicity of about 12 days, which persisted for 14 yr before reverting. Furthermore, we have extracted quasiperiodic oscillations in the plateau at the noneclipsed phases, characterized by periods ranging between 37 and 40 minutes. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | QUASI-PERIODIC OSCILLATIONS ; KIC 9406652 ; CATACLYSMIC VARIABLES ; ACCRETION DISCS ; TILTED DISKS ; SUPERHUMPS ; INSTABILITIES ; SIMULATIONS ; MODEL |
| 资助项目 | National Key R&D Program of China[2022YFE0116800]; National Natural Science Foundation of China[11933008]; National Natural Science Foundation of China[12103084]; Basic research project of Yunnan Province[202301AT070352]; Natural Science Foundation of Anhui Province[2208085QA23]; NASA Science Mission Directorate |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001329303300001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Key R&D Program of China[2022YFE0116800] ; National Natural Science Foundation of China[11933008, 12103084] ; Basic research project of Yunnan Province[202301AT070352] ; Natural Science Foundation of Anhui Province[2208085QA23] ; NASA Science Mission Directorate |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27638]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.School of Mathematics, Physics and Finance, Anhui Polytechnic University, Wuhu 241000, People's Republic of China 2.University of Chinese Academy of Sciences, No. 1 Yanqihu East Rd., Huairou District, Beijing 101408, People's Republic of China; 3.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China; 4.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, People's Republic of China; 5.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, People's Republic of China; qiansb@ynu.edu.cn; 6.College of Physics and Electronic Engineering, Xingtai University, Xingtai 054001, People's Republic of China; |
| 推荐引用方式 GB/T 7714 | Liu W,Qian, Sheng-Bang,Shi XD,et al. The Photometric Study of EX Dra: A Dwarf Nova Exhibiting a Titled and Precessional Disk[J]. ASTROPHYSICAL JOURNAL,2024,974(1). |
| APA | 刘伟,Qian, Sheng-Bang,施相东,孙起斌,Fang, Xiao-Hui,&Wang, Qi-Shan.(2024).The Photometric Study of EX Dra: A Dwarf Nova Exhibiting a Titled and Precessional Disk.ASTROPHYSICAL JOURNAL,974(1). |
| MLA | 刘伟,et al."The Photometric Study of EX Dra: A Dwarf Nova Exhibiting a Titled and Precessional Disk".ASTROPHYSICAL JOURNAL 974.1(2024). |
入库方式： OAI收割
来源：云南天文台
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